@misc{indiciae77b4468f74c7,
  title = {DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES.},
  author = {C.A. Palmer and R.H. Filby},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/70012053},
  note = {Source identifier: 70012053}
}